code: def test_config(self):
      hinge_obj = hinge_metrics.Hinge(name="hinge", dtype="int32")
      self.assertEqual(hinge_obj.name, "hinge")
      self.assertEqual(hinge_obj._dtype, "int32")
  
      # Check save and restore config
      hinge_obj2 = hinge_metrics.Hinge.from_config(
          hinge_obj.get_config()
      )
      self.assertEqual(hinge_obj2.name, "hinge")
      self.assertEqual(len(hinge_obj2.variables), 2)
      self.assertEqual(hinge_obj2._dtype, "int32")
  
file_path: keras/keras/metrics/hinge_metrics_test.py
imports: import numpy
  from keras import testing
  from keras.metrics import hinge_metrics
label_desc: Use image node_id 1 for calling the HingeTest obj's underlying member method code with example usage: obj.test_config() without return types